Filter.



PATENTED AUG. 16, 1904.

T. W' GOREAU.

FILTER.

' APPLIOATION FILED APR. 21, 1904.

2 SHEETS-SHEET 1.

no Monn'L.

E l MR G WP T APPLICATION FILED APR. 21, 1904.

2 SHEETS-SHEET 2.

no mm.

UNITED STATES Patented August 16, 1904.

PATENT OFFICE.

FILTER.

SPECIFICATION formingpart of Letters Patent No. 767,560, dated August 16, 1904. Application filed April 21, 1904:. Serial No. 204,272. (No model.)

To c ZZ whom/it may concern:

Beit known that I, THOMAS W. GoREAU, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented new and useful Improvements in Filters, ofwhich the following is a specification. v 1

My invention pertains to filters, more particularly the type of filters in which water under pressure is forced through a filtering medium; and it contemplates the provision of a highly-eflicient filter of the type stated and one embodying means whereby its filtering medium may be quickly and easily cleared of collected sediment without involving the removal or disconnection of any of its parts.

With the foregoing in mind the invention will he I fully understood from the following description and claims when taken in connection with the. accompanying drawings, forming part of this specification, in which- Figure 1 is adiametrical section of the filter constituting the present and preferred embodiment of my invention, with some of the parts in elevation. Fig. 2 is a horizontal section taken in the plane indicated by the line 2 2 of Fig. 1 looking downwardly, and Fig. 3 is a detail vertical section taken in the plane indicated by the line 3 3 of Fig. 1 looking in the direction indicated by arrow.

Similar letters designate corresponding parts in all of the views of the drawings, referring to which A is the casing of the filter, which is preferably cylindrical in form and made of metal. As shown, the said casing comprises a cylindrical body at, having a hand-hole a, a lower head Z), connected to the body ina water-tight manner and having a central threaded aperture 0 and an aperture d, controlled by a valve 6, and also havinga hand-hole f and an upper head 9, also connected to the body a in a water-tight manner and having an air-cock /l and a hand-hole 'Z and containing an annular chamber 1'. The latter is designed to be connected to a pipe leading from a water-main or other source of supply and is provided in its inner side with a plurality of minute discharge apertures is for a purpose presently pointed out. The hand-holes in the body and heads of the casing are obviously to permit of access being readily gained to the interior of the casing when the same is necessary for any purpose.

B, Fig. 1, is a central vertical foraminated pipe screwed at its lower end into the central threaded aperture of the casing-head Z and extending from said head to a point adjacent to the head g.

C is a pedestal arranged on the casing-head Z and around the lower portion of the pipe B and having a flange Z and a circumferential groove m; D, a plate mounted on the upper portion of the pipe B; E, a filtering medium interposed and held between the flange Z of pedestal O and the plate D, and F F gaskets disposed between the filtering medium and the flange Z and plate D and having for their purpose to render water-tight the joints between said medium and the flange and plate. The filtering medium may be of natural tripoli or other suitable porous material, is cylindrical in form, and is preferably made in two sections, one section being superposed on the other, as shown in Fig. 1.

In Virtue of the construction thus far described it will be observed that when the aircock Zz is opened to permit air to escape from the interior of the casing and a head of water is let into the annular chamber 7' the water will be'thrown against the exterior of the filtering medium and will collect in the casing outside of the said medium until the casing is full. When the casing is full of water, the said air-cock 7b is closed, whereupon the water is forced under pressure through the filtering medium into the chamber in the center of the same and passes from thence through the foraminated pipe B to the discharge-aperture c.

Incident to its passage through the filtering, medium the water will be robbed of all impurities, and hence will be in a pure state- When it passes through the aperture 0 to the point of use.

Gr, Fig. 1, is a cap screwed on the upper end of the pipe B and bearing against the plate D, so as to clamp and hold the filtering medium E between the plate D and the flange Z of the pedestal G and against rotary or other movement.

H- H are rotatable spiders loosely mounted on the pedestal C and plate D, respectively, and having arms I connected by upright bars J, Fig. 2, and also having arms K of circular form in cross-section disposed at right angles to the arms I.

L L are upright bars movable radially with reference to the vertical center of the filter and having boxes r, receiving the spider-arms K, whereby they are guided in their movements by said arms.

M M are upright scraping-blades having outwardly-extending pins s, guided in apertures t of the bars L, and also, by preference, having their inner faces disposed tangentially V to the perimeter of the filtering medium E.

I take up vibration of the scraping-blades M incident to they movement of the same around the filtering medium, and thereby prevent sudden jar and breakage of said medium.

P P are radially-disposed screws extending loosely through the bars L at the ends thereof; Q Q, nuts mounted on said screws and arranged at the outer sides of the bars L; R R, coiled springs interposed between and connected to the screws P and the arms I of the spiders H H and having for their function to exert inward pull on the bars L, with a view of holding the scraping-blades M firmly and yet yieldingly against the perimeter of the filtering medium; S, a shaft journaled in a stuffing-gland T in the upper head of the easing A and bearing a miter-gear U; V, a clutch fixed on the shaft S and having depending arms a; disposed in apertures w of the upper spider H, and W a crank-shaft journaled in suitable bearings on the upper casing-head g and having a beveled pinion X at its inner end intermeshed with the mitergear U.

When my novel filter has been in use and it becomes necessary to clear it of collected mud and other sediment, the same is accomwhen, as will be readily appreciated from the foregoing, the blades M will be moved around the filtering medium E and will quickly and effectually scrape off the sediment adhering to the perimeter of said medium. Incident to the scraping of the perimeter of the filtering medium water is discharged on said perimeter by the annular chamber j, before described, and hence it will be'observed that all collected foreign substance will be quickly washed out of the filter. Subsequent to the cleaning of the filter the valve 6 is closed and the cock It opened until the casing A is full of water, when the said cook it is closed, so as to enable the filter to operate in the manner before described. As the filtering medium E is Worn by repeated scraping thereof, the wear may be compensated for and the efficiency of the scraping means maintained by moving the screws P outwardly through the medium of 'the nuts Q, such outward movement of the said screws operating to increase the tension of the springs R and enabling said springs to hold the bars L under proper pull at points farther inward than those shown in the drawings.

It will be readily appreciated from the foregoing that the cleaning of my novel filter does not involve removal or disconnection of any of the parts thereof; also, that the cleaning may be very expeditiously effected, and hence the operation of the filter need be suspended but a very short period.

I have entered into a detailed description of the construction and relative arrangement of the parts embraced in the present and preferred embodiment of my invention in order to impart a full, clear, and exact understanding of the said embodiment. I do not desire, however, to be understood as confining myself to such specific construction and relative arrangement of parts, as such changes or modifications may be made in practice as fairly fall within the scope of my invention as claimed. For instance, in lieu of employing two scraping-blades, as shown and described, I may employ either one or more than two scrapingblades without in any measure affecting my invention.

Having described my invention, What I claim and desire to secure by Letters Patent,

. The combination, in a filter, of a casing having an annular chamber in its upper portion adapted to be connected with a source of Water-supply, and provided with downwardly and inwardly disposed discharge-apertures, a central vertical foraminated pipe connected to the bottom of the casing and extending up wardly in the casing, a pedestal surrounding the lower portion of said pipe, a plate on the upper portion of the pipe, a cylindrical filtering medium interposed and secured between said pedestal and plate, a cap secured on the upper end of the pipe, a spider loosely mounted on the pedestal, a spider loosely mounted on the cap, above the plate and connected with the first-mentioned spider, a clutch loosely mounted on the cap and engaging the upper spider, and having a shaft extending through the upper end of the casing, a bar carried by guided in the bar, and means interposed between the bar and the scraper for yieldingly pressing the latter against the perimeter of the filtering medium.

In testimony whereof I have hereunto set my hand in presence of tWo subscribing W1t- I nesses.

THOMAS W. GOREAU.

Witnesses:

M. R. MENHAUsnR, EDMOND LEVY. 

